The line joining the three collinear points of intersection of the extensions of corresponding sides in perspective triangles, also called the perspectrix or homology axis.
Perspective Axis
See also
Perspector, Perspective Triangles, Sondat's TheoremExplore with Wolfram|Alpha
References
Kimberling, C. "Encyclopedia of Triangle Centers Glossary." http://faculty.evansville.edu/ck6/encyclopedia/glossary.html.Referenced on Wolfram|Alpha
Perspective AxisCite this as:
Weisstein, Eric W. "Perspective Axis." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/PerspectiveAxis.html